package com.bxait.toymail.ware.service.impl;

import com.alibaba.fastjson.TypeReference;
import com.bxait.com.exception.order.NoStockException;
import com.bxait.com.to.mq.OrderTo;
import com.bxait.com.to.mq.StockDetailTo;
import com.bxait.com.to.mq.StockLockedTo;
import com.bxait.com.utils.PageUtils;
import com.bxait.com.utils.Query;
import com.bxait.com.utils.R;
import com.bxait.com.vo.product.SkuHasStockVo;
import com.bxait.toymail.ware.entity.WareOrderTaskDetailEntity;
import com.bxait.toymail.ware.entity.WareOrderTaskEntity;
import com.bxait.toymail.ware.feign.OrderFeignService;
import com.bxait.toymail.ware.feign.ProductFeignService;
import com.bxait.toymail.ware.service.WareOrderTaskDetailService;
import com.bxait.toymail.ware.service.WareOrderTaskService;
import com.bxait.toymail.ware.vo.OrderItemVo;
import com.bxait.toymail.ware.vo.OrderVo;
import com.bxait.toymail.ware.vo.SkuWareHasStock;
import com.bxait.toymail.ware.vo.WareSkuLockVo;
import lombok.Data;
import org.apache.commons.lang3.StringUtils;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;

import com.bxait.toymail.ware.dao.WareSkuDao;
import com.bxait.toymail.ware.entity.WareSkuEntity;
import com.bxait.toymail.ware.service.WareSkuService;

import javax.annotation.Resource;


@Service("wareSkuService")
public class WareSkuServiceImpl extends ServiceImpl<WareSkuDao, WareSkuEntity> implements WareSkuService {

    @Resource
    WareSkuDao wareSkuDao;
    @Resource
    ProductFeignService productFeignService;
    @Resource
    WareOrderTaskService orderTaskService;
    @Resource
    WareOrderTaskDetailService orderTaskDetailService;
    @Resource
    OrderFeignService orderFeignService;
    @Resource
    RabbitTemplate rabbitTemplate;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        QueryWrapper<WareSkuEntity> wrapper = new QueryWrapper<>();


        String wareId = (String) params.get("wareId");
        String skuId = (String) params.get("skuId");
        if(!StringUtils.isEmpty(wareId)){
            wrapper.and(w->{
                w.eq("ware_id",wareId);
            });
        }
        if(!StringUtils.isEmpty(skuId)){
            wrapper.and(w->{
                w.eq("sku_id",wareId);
            });
        }

        IPage<WareSkuEntity> page = this.page(
                new Query<WareSkuEntity>().getPage(params),
                wrapper
        );

        return new PageUtils(page);
    }

    /**
     * @param skuId   商品的skuId
     * @param wareId  商品的的仓库的id
     * @param skuNum  要增加的数量
     * @==============History===============<br/>
     * @Description // TODO  更新库存信息
     * @Date 2023/3/25 2023/3/25
     * @Author < a href="2277411582@qq.com">chen</ a>
     * @return [java.lang.Long, java.lang.Long, java.lang.Integer]
     */
    @Override
    public void addStock(Long skuId, Long wareId, Integer skuNum) {
        // 1.判断当前仓库有没有这个商品
        QueryWrapper<WareSkuEntity> wrapper = new QueryWrapper<>();
        wrapper.eq("sku_id",skuId).eq("ware_id",wareId);
        List<WareSkuEntity> wareSkuEntities = wareSkuDao.selectList(wrapper);

        if(wareSkuEntities == null || wareSkuEntities.size() == 0){
            // 创建一条库存信息
            WareSkuEntity wareSkuEntity = new WareSkuEntity();
            wareSkuEntity.setSkuId(skuId);
            wareSkuEntity.setWareId(wareId);
            wareSkuEntity.setStock(skuNum);
            wareSkuEntity.setStockLocked(0);

            // 远程查询商品sku的信息
            try {
                R info = productFeignService.info(skuId);
                if(info.getCode() == 0){
                    Map<String, Object> data = (Map<String, Object>) info.get("data");
                    wareSkuEntity.setSkuName((String) data.get("skuName"));
                    wareSkuDao.insert(wareSkuEntity);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }else {
            // 直接添加库存
            wareSkuDao.addStock(skuId,wareId,skuNum);
        }

    }

    /*
     * @param skuIds skuIds
     * @==============History===============<br/>
     * @Description // TODO  查询当前sku是否有货
     * @Date 2023/4/13 23:30
     * @Author <a href="qq:2277411582@qq.com">chen</a>
     * @return
     */
    @Override
    public List<SkuHasStockVo> getSkusHasStock(List<Long> skuIds) {
        List<SkuHasStockVo> collect = skuIds.stream().map(skuId -> {
            SkuHasStockVo vo = new SkuHasStockVo();
            //查询当前sku的总库存量
            //SELECT SUM(stock-stock_locked) FROM `wms_ware_sku` WHERE sku_id=1
            Long count = baseMapper.getSkuStock(skuId);
            vo.setSkuId(skuId);
            vo.setHasStock(count == null ? false : count > 0);
            return vo;
        }).collect(Collectors.toList());
        return collect;
    }

    /*
     * @param vo
     * @==============History===============<br/>
     * @Description //    锁定库存 库存解锁的场景
     *           1）、下订单成功，订单过期没有支付被系统自动取消、被用户手动取消。都要解锁库存
     *           2）、下订单成功，库存锁定成功，接下来的业务调用失败，导致订单回滚。
     *           之前锁定的库存就要自动解锁。
     * @Date 2023/5/13 2023/5/13
     * @Author < a href="2277411582@qq.com">chen</ a>
     * @return java.lang.Boolean
     */
    @Override
    public Boolean orderLockStock(WareSkuLockVo vo) {

        /*
         * 保存库存工作单的详情。
         * 追溯。
         */
        WareOrderTaskEntity taskEntity = new WareOrderTaskEntity();
        taskEntity.setOrderSn(vo.getOrderSn());
        orderTaskService.save(taskEntity);

        // 1、按照下单的收货地址，找到一个就近仓库，锁定库存。
        // 1、找到每个商品在哪个仓库都有库存
        List<OrderItemVo> locks = vo.getLocks();

        List<SkuWareHasStock> collect = locks.stream().map(item -> {
            SkuWareHasStock stock = new SkuWareHasStock();
            Long skuId = item.getSkuId();
            stock.setSkuId(skuId);
            stock.setNum(item.getCount());
            // 查询这个商品在哪里有库存
            List<Long> wareIds = wareSkuDao.listWareIdHasSkuStock(skuId);
            stock.setWareId(wareIds);
            return stock;
        }).collect(Collectors.toList());

        if(collect != null && collect.size() > 0){
            for (SkuWareHasStock hasStock : collect) {
                Boolean skuStocked = false;
                Long skuId = hasStock.getSkuId();
                List<Long> wareIds = hasStock.getWareId();
                if (wareIds == null || wareIds.size() == 0) {
                    // 没有任何仓库有这个商品的库存
                    throw new NoStockException(skuId);
                }
                // 1、如果每一个商品都锁定成功，将当前商品锁定了几件的工作单记录发给MQ
                // 2、锁定失败。前面保存的工作单信息就回滚了。发送出去的消息，即使要解锁记录，由于去数据库查不到id，所以就不用解锁
                //     1： 1 - 2 - 1   2：2-1-2  3：3-1-1(x)
                for (Long wareId : wareIds) {
                    // 成功就返回1,否则就是0
                    Long count = wareSkuDao.lockSkuStock(skuId, wareId, hasStock.getNum());
                    if (count == 1) {
                        skuStocked = true;
                        // 告诉MQ库存锁定成功
                        WareOrderTaskDetailEntity entity = new WareOrderTaskDetailEntity(null, skuId, "", hasStock.getNum(), taskEntity.getId(), wareId, 1);
                        orderTaskDetailService.save(entity);
                        StockLockedTo lockedTo = new StockLockedTo();
                        lockedTo.setId(taskEntity.getId());
                        StockDetailTo stockDetailTo = new StockDetailTo();
                        BeanUtils.copyProperties(entity, stockDetailTo);
                        // 只发id不行，防止回滚以后找不到数据
                        lockedTo.setDetail(stockDetailTo);
                        // 在库存进行锁定的时候,发一条消息到mq,到延时队列中去,过上一段时间,去查看数据库中这个订单的状态,那没有支付的我们就需要解锁库存
                        rabbitTemplate.convertAndSend("stock-event-exchange", "stock.locked", lockedTo);
                        break;
                    } else {
                        //当前仓库锁失败，重试下一个仓库
                    }
                }
                if (skuStocked == false) {
                    //当前商品所有仓库都没有锁住
                    throw new NoStockException(skuId);
                }
            }
        }


        return null;
    }

    @Override
    public void unlockStock(StockLockedTo to) {
        StockDetailTo detail = to.getDetail();
        Long detailId = detail.getId();
        //解锁
        //1、查询数据库关于这个订单的锁定库存信息。
        //  有：证明库存锁定成功了
        //    解锁：订单情况。
        //          1、没有这个订单。必须解锁
        //          2、有这个订单。不是解锁库存。
        //                订单状态：  已取消：解锁库存
        //                          没取消：不能解锁
        //  没有：库存锁定失败了，库存回滚了。这种情况无需解锁
        WareOrderTaskDetailEntity byId = orderTaskDetailService.getById(detailId);
        if (byId != null) {
            //解锁
            Long id = to.getId();
            WareOrderTaskEntity taskEntity = orderTaskService.getById(id);
            String orderSn = taskEntity.getOrderSn();//根据订单号查询订单的状态
            R r = orderFeignService.getOrderStatus(orderSn);
            if (r.getCode() == 0) {
                //订单数据返回成功
                OrderVo data = r.getData(new TypeReference<OrderVo>() { });
                if (data == null || data.getStatus() == 4) {
                    //订单不存在
                    //订单已经被取消了。才能解锁库存
                    //detailId
                    if (byId.getLockStatus() == 1) {
                        //当前库存工作单详情，状态1 已锁定但是未解锁才可以解锁
                        unLockStock(detail.getSkuId(), detail.getWareId(), detail.getSkuNum(), detailId);
                    }
                }
            } else {
                //消息拒绝以后重新放到队列里面，让别人继续消费解锁。
                throw new RuntimeException("远程服务失败");
            }

        } else {
            //无需解锁
        }
    }

    /*
     * @param to
     * @==============History===============<br/>
     * @Description //   订单关闭,解锁库存
     * @Date 2023/6/18 2023/6/18 
     * @Author < a href="2277411582@qq.com">chen</ a>
     * @return void
     */
    @Override
    public void unlockStock(OrderTo orderTo) {
        String orderSn = orderTo.getOrderSn();
        // 查一下最新库存的状态，防止重复解锁库存
        WareOrderTaskEntity task = orderTaskService.getOrderTaskByOrderSn(orderSn);
        Long id = task.getId();
        // 按照工作单找到所有没有解锁的库存，进行解锁
        List<WareOrderTaskDetailEntity> entities = orderTaskDetailService.list(
                new QueryWrapper<WareOrderTaskDetailEntity>()
                        .eq("task_id", id)
                        .eq("lock_status", 1));
        if(entities != null && entities.size() > 0){
            for (WareOrderTaskDetailEntity entity : entities) {
                unLockStock(entity.getSkuId(),entity.getWareId(),entity.getSkuNum(),entity.getId());
            }
        }
    }



    /*
     * @param skuId    商品id
     * @param wareId   库存id
     * @param num      解锁的数量
     * @param taskDetailId      库存工作详情的工作单id
     * @==============History===============<br/>
     * @Description //   解锁库存
     * @Date 2023/6/18 2023/6/18
     * @Author < a href="2277411582@qq.com">chen</ a>
     * @return void
     */
    private void unLockStock(Long skuId, Long wareId, Integer num, Long taskDetailId) {
        // 库存解锁
        wareSkuDao.unlockStock(skuId, wareId, num);
        //更新库存工作单的状态
        WareOrderTaskDetailEntity entity = new WareOrderTaskDetailEntity();
        entity.setId(taskDetailId);
        entity.setLockStatus(2);//变为已解锁
        orderTaskDetailService.updateById(entity);
    }


}